Shower holder attachment



FIG. 1 is a perspective view of my new design for a shower holder attachment.

FIG. 2 is a top plan view.

FIG. 3 is a bottom plan view.

FIG. 4 is a right side elevation view.

FIG. 5 is a rear elevation view.

FIG. 6 is a left side elevation view; and,

FIG. 7 is a front elevation view.

The broken line showing of portions of the attachment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a shower holder attachment, as shown and described. 